code: def dtype(self):
      pass
  
file_path: botorch/test/utils/test_containers.py
imports: from dataclasses import dataclass
  from unittest.mock import patch
  import torch
  from botorch.utils.containers import BotorchContainer, DenseContainer, SliceContainer
  from botorch.utils.testing import BotorchTestCase
  from torch import Size
label_desc: Use image node_id 5 for calling the BadContainer obj's underlying member method code with example usage: obj.dtype() without return types